US President Donald Trump says he's prepared to mediate between claimants to the South China Sea, which include Vietnam and China.
"If I can help mediate or arbitrate, please let me know," Trump said in comments at the start of a meeting in Hanoi on Sunday with Vietnam's president, Tran Dai Quang.
Trump acknowledged that China's position on the South China Sea, nearly all of which is claimed by Beijing, was a problem.
"I'm a very good mediator and arbitrator," he said.
He also said that China was helping to resolve tensions over North Korea and added he hoped Russia would do the same.